I just found this image online for a proposal of the NEO GAS coin logo - http://imgur.com/qbobWSo. So far this is the only image I have found of what it might be.
I have accumulated some NEO on Bittrex, and successfully transferred it to my NEON Wallet (version 0.0.4). Once I got it in there, I was able to click the CLAIM GAS button, about 5 times, and then the button became disabled (greyed out), although the amounts are still displayed. I have been unable to claim GAS since. So far, the internet has shown this is a common problem, but no one seems to have an explanation or solution. I have read a couple of posts that say that you must first generate 1 GAS to be able to have the claim show, and another said it is only distributed once a month. There is no official confirmation of any of these statements I can find, and so far, I am thinking there is a bug in the wallet causing this.
The NEON wallet also shows "0" for each fractional amount of GAS I did claim before the button was disabled, but the NEO Tracker site does show my account was credited the fractional GAS. Someone did post online that the amount must be greater than .001 GAS to show in the wallet, but I have not seen this happen. Anyone have any feedback about this?